Digicash and NetCheque are both offering free demonstrations of their ecash systems. The first uses a combination of credit cards, the latter an electronic checking account form. If you don't have time to try them yourself, my large experiment is with Digicash and my small experiment is with NetCheque. Both experiments were conducted to determine what kinds of goods one might purchase on the internet. Both reveal limitations in the range of goods available for sale.
Monetary Freedom Security Try it--free! Innovation as Usual Business as Usual Virtual Banks Experiments Terms for Ecash